Posts Tagged ‘commercial reverse osmosis’

Industrial Brackish Water Reverse Osmosis Unit

Major Water Treatment Company, Northern California, USA

Major Water Treatment Company, Northern California, USA



In July 2008, Pure Aqua successfully supplied Industrial Brackish Water Reverse Osmosis (BWRO) system to produce 144,000 GPD of product at 77°F using (20) 8″x40″ Hydranautics ESPA1 membrane elements, (4) 5M FRP pressure vessels, SS multistage Grundfos CRN pump, microprocessor based controls and a digital conductivity and ORP read out, 460V/3ph/60Hz.


Pre-treatment of raw water includes antiscalant dosing to minimize the precipitation of sparingly soluble sulfate salts, sodium bisulfite (SBS) dosing to remove free chlorine in the feed water.

The Brackish Water Reverse Osmosis system was selected from our RO-400 Series. BWRO unit consists of 5-micron cartridge filters to reduce feed water Silt Density Index (SDI) and to limit the SS to 5-micron size.


From a feed TDS of about 1,000 mg/L at a temperature range of 19°C and 27°C, the BWRO skid produces 100gpm of drinking water with TDS less than 50mg/L.


6 Commercial Brackish Water Reverse Osmosis Units for Hemodialysis application

Commercial Brackish Water Reverse Osmosis Units


In January 2009, Pure Aqua supplied to a major water treatment company in Croatia 6 Commercial Brackish Water Reverse Osmosis (BWRO) Units to produce 7500gpd at max. feed TDS 1000 PPM.


Due to the increased exposure of dialysis patients to water used in the manufacture of dialysis fluid, which originates as drinking water, requires additional treatment to ensure that it meets a more stringent contaminant level content than drinking water. The more stringent levels are embodied in national and international standards that have evolved out of the desire to minimize the complications arising from the use of inappropriate water quality.

For water used in the preparation of dialysis fluid, chemical contaminant levels are set lower for three groups of chemical contaminants: contaminants to which exposure is associated with clinical sequel such as aluminum and fluoride, compounds present in the dialysis fluid (e.g. sodium), and trace metals.

The dialytic process utilizes high volumes of water in the preparation of the dialysis fluid. Improvements in water treatment equipment have resulted in improvements in chemical quality. Awareness that endotoxin and bacterial fragments present in the water distribution loop within the dialysis, are able to cross the dialyser membrane, has resulted in an increased focus on this aspect of water quality. Practically, the age of many water treatment plants, extensions of distribution systems and suboptimal cleaning procedures have prevented the achievement of optimal microbiological quality on a routine basis. When achieved and maintained, clear benefits to the patient have been demonstrated.

The BWRO Unit was selected from our RO-200 Series, model number RO-7500. It includes (5) 4″x40″ membrane elements from (Filmtec LP-4040), (5) FRP pressure vessels, SS pump, 5 micron prefilter, pressure regulating valve, low pressure switch, pressure gauges, advanced microprocessor control panel, multi media filter, carbon filter, water softener and post UV and 0.2 micron filter to remove dead bacteria (pyrogen).

Get more information on Brackish Water Reverse Osmosis

Commercial Brackish Water RO Units

Commercial Brackish Water RO Units


In September 2008, Pure Aqua successfully manufactured and supplied to a major water treatment company in Dubai UAE, more than 15 units of Commercial Brackish Water Reverse Osmosis (BWRO) Units to produce different capacities between 1,500 GPD to 6, 000 GPD at a maximum 2000 ppm feed water TDS.

Reverse osmosis occurs when the water is moved across the membrane against the concentration gradient, from lower concentration to higher concentration. To illustrate, imagine a semi-permeable membrane with fresh water on one side and a concentrated aqueous solution on the other side. If normal osmosis takes place, the fresh water will cross the membrane to dilute the concentrated solution. In reverse osmosis, pressure is exerted on the side with the concentrated solution to force the water molecules across the membrane to the fresh water side.

Reverse osmosis is often used in commercial and residential water filtration. It is also one of the methods used to desalinate seawater. Sometimes reverse osmosis is used to purify liquids in which water is an undesirable impurity (e.g., reclaimed waste water, ethanol).


The Commercial Brackish Water Reverse Osmosis Units were selected from our RO-200 Series, model number RO-1500 and RO-6000

The BWRO Unit consists of TFC spiral wound membranes to have a recovery rate of 60% with an advanced microprocessor control panel.


From a feed TDS of 2,000 mg/L at temperature range of 25 °C, the system produces from 1.2 to 7gpm of high quality water at less than 100 ppm.

For more Information About Commercial Brackish Water RO Units

RO-400 – Industrial Reverse Osmosis

28k to 173k GPD Brackish Water ROIndustrial Reverse Osmosis / RO-400

Reverse osmosis, also known as hyper filtration, is used to purify water and remove salts and other impurities. It is also capable of rejecting bacteria, sugars, proteins, particles, dyes, and other constituents that have a molecular weight of greater than 150-250 dalton.


  • 8” TFC spiral wound membranes
  • FRP membrane housing
  • Epoxy painted steel frame
  • Stainless steel multi-stage pump with TEFC motor
  • 5 micron cartridge prefilter
  • Power supply: 460V/3Ph/60Hz
  • PLC based control panel
  • Programmable time delay and set points
  • Status lamps
  • 115V/60Hz control voltage
  • Motor starter
  • NEMA 12 enclosure with disconnect and interlocking rotary handle
  • Low pressure switch
  • High pressure switch
  • Liquid filled pressure gauges, panel mount for pump suction, membrane feed, and final concentrate
  • Permeate conductivity monitor
  • Permeate & concentrate flow meters
Model No. Permeate HPP @ 3 years Membranes Approx Wt. (Lbs)
GPD GPM PSI HP (50Hz) HP (60Hz) Qty. Array
TW-28K-1480 28,800 40 240 7.5 10 4 1 2,300
TW-36K-1580 36,000 44 225 10 10 5 1 2,400
TW-43K-1680 43,000 48 225 15 10 6 1 2,500
TW-57K-2480 57,000 57 230 15 15 8 1:01 2,600
TW-72K-2580 72,000 67 250 20 15 10 1:01 2,700
TW-87K-3480 87,000 83 230 20 20 12 2:01 2,800
TW-108K-3580 108,000 100 235 25 25 15 2:01 3,200
TW-130K-3680 130,000 120 235 25 25 18 2:01 3,500
TW-144K-4580 144,000 134 235 25 25 20 2:02 4,200
TW-173K-4680 173,000 160 230 25 25 24 3:01 4,750

For More Information: Industrial Reverse Osmosis

Reverse Osmosis Chemicals

Reverse Osmosis Chemicals

Reverse osmosis chemicals to improve the performance of your reverse osmosis system’s membranes.

Reverse osmosis (RO) membrane performance can be negatively impacted by impurities that build up on the membrane surface during operations. Suspended solids, microorganisms and mineral scale can foul membrane elements. These deposits can cause loss in output and/or rejection levels and reduce total system performance.

The membrane separation process utilizes a high-pressure feed to force water through a semi-permeable barrier. As the water passes through the membrane, contaminates are rejected and eventually flushed to the waste stream. The concentration of the contaminants is crucial to determine the design and operation of the membrane system. During normal operations, membranes can become fouled by colloidal material, inorganic oxides, biological matter, and scaling salts.

Fouling involves the entrapment of material in the feed water or deposits on the membrane surface. These deposits can accrue until they cause a reduction in flow, increase in feed pressure requirements, loss of salt rejection, or all three.

Pure Aqua membrane chemical’s products are formulated to treat a wide variety of commercial reverse osmosis (RO) systems, nanofiltration (NF), and ultrafiltration (UF) systems.

Pure Aqua offers a wide array of products to help you improve the performance of your membranes:


The Antiscalant chemical from Pure Aqua is designed to eliminate scale and reduce fouling in membrane systems, regardless of the feedwater source.

Successful membrane cleaning relies on both the effectiveness of the cleaning compounds and the design and operation of the cleaning equipment. Pure Aqua can offer suggestions on cleaning system design and cleaning procedures to ensure the most effective results.


Effective control of bacterial growth and slime.

Need better membrane performance?

At Pure Aqua, we understand how critical membrane performance is to your reverse osmosis systems. We offer a complete line of products to extend the life of membrane elements, improve the quality of water produced and reduce the amount of maintenance and cleaning your reverse osmosis system requires.